Focus 3 2nd ed Unit 3 S.B.p.34

Oh no. A traffic jam. There  ______ an accident.

I don't know. Someone _______  a cigarette from a bridge.

I am sure that ________ a tiger.

I am sure he wasn't there . You _______

Perhaps he is busy at the moment. He ________.

We _______ go to Greece this summer, but we haven’t decided yet.

I don’t know why Pat hasn’t arrived yet. She _____ have missed the bus.

It ______ be Diana’s tent. She never goes camping

Greg _____ have reached his destination yet. It’s only 7 p.m.

Ben knew everything about Gothic painting. Definitely, he _______ have studied art history.